I think so, usually any multivitamin is fine. None of them are FDA approved so you never know what you are getting in them but as a general note any multivit works fine. As for the omega supplementation, your diet depends on that. If you eat enough meat/poultry you dont need the omega 6. If you eat enough fish or seafood you dont need the omega 3. Omega 9 is useless for humans imo.

Every day I take wellman nutrion tablets and omega 3,6,9 combi tablets from Holland and Barrett. Are these good as general supplements?

Depends on your goals and your diet, really. Supplementing with omega 3/6/9 is fine if you're not big on fish or your diet isn't great. Even for someone like me that eats a very clean and balanced diet, I find that supplementing with omega 3 is still useful.